AD8138ARZ-R7 Data Converter IC Differential Amplifiers IC Lo-Distortion ADC
AD8138ARZ-R7 Data Converter IC Differential Amplifiers IC Lo-Distortion ADC
FEATURES
- Adjustable output common-mode voltage
- Low harmonic distortion
- −94dBcSFDR@5MHz
- −85 dBc SFDR @ 20 MHz
- −3 dB bandwidth of 320 MHz, G = +1
- Fast settling to 0.01% of 16 ns
- Fast overdrive recovery of 4 ns
- Low input voltage noise of 5 nV/√Hz Low power 90 mW on 5 V
ENHANCED PRODUCT FEATURES
- Supports defense and aerospace applications (AQEC) Extended temperature range −55oC to +105°C Controlled manufacturing baseline
- One assembly/test site
- One fabrication site
- Enhanced product change notification Qualification data available on request
APPLICATIONS
- ADC drivers Single-ended-to-differential converters IF and baseband gain blocks Differential buffers
- Line drivers
GENERAL DESCRIPTION
The AD8138-EP is a major advancement over op amps for differential signal processing. The AD8138-EP can be used
as a single-ended-to-differential amplifier or as a differential-to- differential amplifier. The AD8138-EP is as easy to use as an op amp and greatly simplifies differential signal amplification and driving. Manufactured on Analog Devices, Inc., proprietary XFCB bipolar process, the AD8138-EP has a −3 dB bandwidth of 320 MHz and delivers a differential signal with the lowest harmonic distortion available in a differential amplifier. The AD8138-EP has a unique internal feedback feature that provides balanced output gain and phase matching, suppressing even order harmonics. The internal feedback circuit also minimizes any gain error that would be associated with the mismatches in the external gain setting resistors.
The AD8138-EP’s differential output helps balance the input to the differential ADCs, maximizing the performance of the ADC.
The AD8138-EP eliminates the need for a transformer with high performance ADCs, preserving the low frequency and dc information. The common-mode level of the differential output is adjustable by a voltage on the VOCM pin, easily level-shifting the input signals for driving single-supply ADCs. Fast overload recovery preserves sampling accuracy.
The AD8138-EP distortion performance makes it an ideal ADC driver for communication systems, with distortion performance good enough to drive state-of-the-art 10-bit to 16-bit converters at high frequencies. The AD8138-EP’s high bandwidth and IP3 also make it appropriate for use as a gain block in IF and baseband signal chains. The AD8138-EP offset and dynamic performance make it well suited for a wide variety of signal processing and data acquisition applications. The AD8138-EP is available in the MSOP package for operation over −55°C to +105°C temperatures.
Full details about this enhanced product are available in the AD8138 data sheet, which should be consulted in conjunction with this data sheet.
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